From b12dbd21abedcfab84b249df52c5e5a039e3d028 Mon Sep 17 00:00:00 2001
From: Dylan William Hardison <dylan@hardison.net>
Date: Wed, 3 Oct 2018 17:52:23 -0400
Subject: no bug - make libcmark-gfm optional (#792)

---
 Bugzilla.pm                      | 4 ++--
 Bugzilla/Install/Requirements.pm | 1 -
 Makefile.PL                      | 9 ++++++++-
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/Bugzilla.pm b/Bugzilla.pm
index 56020b230..94defda3b 100644
--- a/Bugzilla.pm
+++ b/Bugzilla.pm
@@ -29,8 +29,6 @@ use Bugzilla::Flag;
 use Bugzilla::Hook;
 use Bugzilla::Install::Localconfig qw(read_localconfig);
 use Bugzilla::Install::Util qw(init_console include_languages);
-use Bugzilla::Markdown::GFM;
-use Bugzilla::Markdown::GFM::Parser;
 use Bugzilla::Memcached;
 use Bugzilla::Template;
 use Bugzilla::Token;
@@ -750,6 +748,8 @@ sub check_rate_limit {
 }
 
 sub markdown_parser {
+    require Bugzilla::Markdown::GFM;
+    require Bugzilla::Markdown::GFM::Parser;
     return request_cache->{markdown_parser}
         ||= Bugzilla::Markdown::GFM::Parser->new( {extensions => [qw( autolink tagfilter table strikethrough)] } );
 }
diff --git a/Bugzilla/Install/Requirements.pm b/Bugzilla/Install/Requirements.pm
index c4813abde..beed721f3 100644
--- a/Bugzilla/Install/Requirements.pm
+++ b/Bugzilla/Install/Requirements.pm
@@ -96,7 +96,6 @@ use constant FEATURE_FILES => (
     patch_viewer  => ['Bugzilla/Attachment/PatchReader.pm'],
     updates       => ['Bugzilla/Update.pm'],
     mfa           => ['Bugzilla/MFA/*.pm'],
-    markdown      => ['Bugzilla/Markdown.pm'],
     memcached     => ['Bugzilla/Memcache.pm'],
     s3            => ['Bugzilla/S3.pm', 'Bugzilla/S3/Bucket.pm', 'Bugzilla/Attachment/S3.pm']
 );
diff --git a/Makefile.PL b/Makefile.PL
index 293a66f6b..c8d78f5cd 100755
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -33,7 +33,6 @@ BEGIN {
 
 # PREREQ_PM
 my %requires = (
-    'Alien::libcmark_gfm'      => '3',
     'Algorithm::BloomFilter'   => '0.02',
     'CGI'                      => '4.31',
     'CGI::Compile'             => 0,
@@ -122,6 +121,14 @@ if ( $OSNAME eq 'linux' && -f '/etc/debian_version' ) {
 }
 
 my %optional_features = (
+    alien_cmark => {
+        description => 'Support GitHub-flavored markdown',
+        prereqs => {
+            runtime => {
+                requires => { 'Alien::libcmark_gfm'      => '3' },
+            },
+        },
+    },
     argon2 => {
         description => 'Support hashing passwords with Argon2',
         prereqs => {
-- 
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